README.md:
- Update Essential files section with dual-mode default behavior
- Update dual-mode display section with port 9999 as Remote HD
- Update Display Modes table to include port 9999 and dual-mode note
WIKI.md:
- Add Remote HD Mode (Port 9999) section with full HD details
- Update Start Script Options table with dev:9999 and dual-mode
- Clarify port usage (8888 kiosk, 9090 legacy remote, 9999 remote HD)
install_everything.sh:
- Add dual-mode server information to startup message
